Sigmund bergmans



(No Model.) y S. BERGMANN.

CUT-OUT.

No. 445,362. Patented Jan. 2'7, 1.1891.

Fig. 5,

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H/S ATTORNEYS,

WITNESSES:

UNITED STATES PATENT OFFICE.

SIGMUND BERGMANN, OFNEV YORK, N. Y.

CUT-OUT.

SPECIFICATION forming part of Letters Patent No. 445,362, dated January2'?, 1891.

Application filed January 25, 1890i Serial No. 338,132- (No modeld Toall 107mm, t may concern:

Be it known that I, SIGMUND BERGMANN, of New York, county and State ofNew York, have invented a certain new and useful Improvementin Cut-Outsforlneandescent Electric Lamps, of which the following is aspeciioation.

I will describe a device embodying my improvement, and then point ontthe novel features in the claims.

In the accompanying drawings, Figure l represents a cut-out embodying myimprovement and applied to a tube or pipe. Fig. 2 is a view of one sideof the cut-out with its casing removed. Fig. 3 is afront view, partly inSection, with the casing removed. Fig. et shows one side of the eut-outwheel and the con tact strips thereof. Fig. 5 is a section of thecasing, and Fig. G showsa modification of a portion ot the device.

Similar letters of reference indicate like parts in all the igures ofthe drawings.

Referring by letter to the drawings, A designates a section ofconductor-tubing, which may be a portion of the arm of a chandelier whena cut-out is employed for each lamp, or it may be the main verticalportion of the ixture when one cut-out is employed for the severallamps.

B designates the cutout, the frame consisting ot' the side portions a,which are here shown as bowed outward, and the tubular end portions a.The end portions a are threaded on their outer side to engage aninternal thread of the tube. As shown in Fig. 6, setscrews may beemployed to prevent the parts from turning upon each other. I prefer touse the set-screws as shown, as the parts should be fastened together,and pins will not answer, as the parts could not be taken apart withoutinjury. By soldering the parts together they could not be separated,and, further, during the operation of soldering the insulation might beaffected.

C designates a rotary shaft having hearings in the side portions a andhaving a tin ger-piece h on one of its ends, by means of which the shaftmay be rotated.

Loosely mounted on the shaft C is the cutout wheel l/ of insulatingmaterial, such, for instance, as hard rubber. rihis wheel has on itsperiphery four eccentric cam-surfaces c c', providing the radialshoulders c2. The two opposite cam-surfaces c are faced with metalcontacts h2. These contacts h2 are joined together at one side of thewheel by a strip b3, having an opening through it large enough for thepassage ot the shaft C without forming a Contact. This strip Z2S ispreferably integral with the contacts b2, so that the contacts and stripmay be placed upon the wheel and held by friction. On one side of thewheel b are formed ca1n-surfaces providing shoulders c3, and a pin d,extended through the shaft C, impinges against these shoulders when theshaft is rotated in one direction, and thus rotates the wheel, with theshaft, to make or break the electrical connection. The wheel is adaptedto.1nove longitudinally on the shaft, so that when the shaft is rotatedin a direction reverse to that for rotating the wheel the pin (L wil]ride over the cani-surfaces, pushing the wheel lengthwise oi' the shaftwithout imparting rotary motion to the wheel. A spring d serves to forcethe wheel against the pin d, and an insulating-washer d? is interposedbetween the spring and strip b3, so that the electrical current may notpass from the contacts to shaft or outer portions and xture.

D represents resilient metal contact-pieces impinging against theperiphery of the wheel b and having shank portions da, which ma;T betubular, extended into the tubular end por tions a and insulatedtherefrom by a hushing di. This bushing serves to hold the contact-piece rigidly in its position. In Fig. 6 I have shown a straightshank portion d3, secured by a screw to the insulator di, which in thisevent is in the form of a block. A linewire e, properly insulated,extends through the tubular portions a and leads directly to the lamp.The other line-wire e has its end inserted between the tubular portiono. and the shank cl3 in contact with the shank and insulated from thetubular portion a. A wire e2 is similarly connected to the shank of theopposite contaot-piece and leads to the lamp. It is obvious that whenthe wheel Z2 is rotated, so that the contacts connect with thecontact-pieces, an electrical circuit is established, and when the wheelis turned so ICO that the cam-surfaces c connect with the resilientcontact-pieces the current is cut out. It may be here stated that thecontacts b2 are so arranged on the Wheel c and the connection betweenthe rotary shaft and wheel so related that when the several contacts arein engagement the finger-piece b will stand parallel with the axis ofthe gas-tube and trans'- verse to the tube when the contacts are not inengagement. is not lighted when the linger-piece is turned to connectthe operator may know that the current is broken at some other point,provided, of course, the finger-piece be turned in the right direction,as before explained.

The outer casing or shell consists of two hemispherical portions f, eachprovided with semicircular notches f to embrace the sides of thegas-pipe and semicircular notches f3 to provide a passage for the rotaryshaft. It is designed that the two portions f shall be locked togetherin such manner as to be easily detached. One of the means for so lockingthe parts I have illustrated and describe as follows: One of theportions f is provided on its edge with a rib f and the other portionhas on its edge a groove f4. When the two portions fare placed inposition to cover the cutout, the rib of one will be forced into thegroove of the other and the parts will beheld together. When it isdesired to separate the parts, it is only necessary to push laterally onY one of the nibs or projections f5.

By this means, if the lamp and secured Within the tubular portions ofthe frame, substantially as specified.

2. In a cut-out, the combination of the frame having the tubularportions Vconstruct` ed to connect with tnbililg,v a. rotary shaft, aY

cut-out Wheel loosely mounted on said shaft, contact-plates on thewheel, and resilient contact-pieces having tubular Shanks secured in thetubular portions of the frame and insulated therefrom, substantially asspecified.

3. In a cut-out, the combination of the rotary shaft, a wheel looselymounted thereon and having cam-surfaces on its side, a pin extendingfrom the shaft to engage with the shoulder portions of the cam-surfaces,contact-plates on the periphery of the wheel having an integralconnecting-strip provided with a hole for the passage of the shaft, thesaid plates and strip being held in place by friction, and resilientcontact-pieces, substantially as specified.

4. In a cut-out, the combination of the frame consisting of theoutwardly-bowed side portions and the tubular end portions, a rotaryshaft having bearings in the side portions of the frame, a cut-out Wheeland contacts, and the casing consisting of two parts constructed toinclose the cut-out and frame, substantially as specified.

SIGMUND BERGMANN.

Vitnesses:

HULBERT PECK, ORLANDO C. J. SGHARFF.

